chore(backlog): 记录 g167 完成

.ua/backlog.json

@@ -1692,6 +1692,14 @@
       "acceptance": "OptionItem 与 CheckOption 新增 group：select 在组首插灰色小标题（段间分隔线）、整组过滤无命中时标题隐藏；multiSelect 候选同步支持且小标题不占键盘下标；演示页加分组下拉实例；manifest 的 options 描述与步骤、llms-full 同步；npm run check 全绿。",
       "notes": "",
       "status": "done"
+    },
+    {
+      "id": "g167",
+      "title": "弹窗支持内置页脚与异步确认",
+      "motivation": "「取消 + 确定」这两个按钮几乎每个确认框都要手拼一遍，异步提交时还得自己管「处理中」禁用与成功后收窗，各处写法不一。",
+      "acceptance": "modal 新增 confirmText / cancelText / onConfirm：不传 footer 时渲染内置按钮组（footer 仍优先），onConfirm 返回 Promise 时按钮禁用并显示「处理中…」，成功自动收窗、失败保持打开；演示页把确认弹窗改成异步确认；manifest props 表与步骤、llms-full 同步；npm run check 全绿。",
+      "notes": "",
+      "status": "done"
     }
   ]
 }

.ua/iterations.log

@@ -211,3 +211,4 @@
 {"ts":"2026-10-26T16:09:59+08:00","id":"g164","result":"done","commit":"b533903","summary":"descriptions 新增 layout=vertical 与 extra 标题插槽"}
 {"ts":"2026-10-26T16:11:06+08:00","id":"g165","result":"done","commit":"804ab3b","summary":"stepper 新增 direction=vertical（圆点下方连线，已走段用主色）"}
 {"ts":"2026-10-26T16:13:05+08:00","id":"g166","result":"done","commit":"a80644c","summary":"select/multiSelect 支持 option.group 分组小标题（过滤后空组标题隐藏）"}
+{"ts":"2026-10-26T16:14:19+08:00","id":"g167","result":"done","commit":"ff94429","summary":"modal 新增 confirmText/cancelText/onConfirm 内置页脚，Promise 期间按钮转处理中"}